Boiler-cleaner.



N0. 838 898. PATENTED DEC. 18, 1906.

G. H. PRESCOTT.

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- r23" 5'? ATTORNEYS UNITED STATES PATENT OFFICE.

CHARLES H. PRESCOTT, OF EAST LIVERPOOL, OHIO, ASSIGNOR OF ONE- HALF TOS. S. MOOURDY, OF TORONTO, OHIO.

BOILER-CLEANER.

Patented Dec. 18, 1906.

Application filed August 15, 1906- Serial No. 330,692.

1'0 all whom it may concern:

Be it known that 1, CHARLES H. PREsooTT, a citizen of the United States,and a resident of East Liverpool, in the county of Oolumbiana and Stateof Ohio, have invented a new and Improved Boiler-Cleaner, of which thefollowing is a full, clear, and exact description.

This invention relates to boiler-cleaners, and is particularly useful indevices of this character in which live steam is used to blow the sootor other accumulations from the gases of combustion from the fines offiretube boilers.

The object of the invention is to provide a boiler-cleaner simple,strong, and durable is construction and having a section slidablymounted in the rear wall of the boiler and having a nozzle which can berotated to permit the steam to be forced through all the tubes of theboiler.

A further object of the invention is to provide in a device of thischaracter a nozzle which may be withdrawn into a recess in the back wallof the boiler to protect the nozzle from direct contact with the heatedgases of combustion.

The invention consists in the construction and combination of parts tobe more fully described hereinafter and definitely set forth in theclaims.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in all the figures,

and in which Figure 1 is a vertical longitudinal section of a boilerwith my invention applied thereto. Fig. 2 is a horizontal cross-sectionof a por tion of the rear wall of a boiler directly above the device,and Fig. 3 is an enlarged horizontal cross-section on the line 3 3 ofFig. 1.

Before proceeding to a detailed description of my invention it should beunderstood that the same comprises a rigid tube passing through the rearwall of the boiler and having a second tube slidably mounted within itand projecting from its inner end. The second tube has alaterally-disposed tapering nozzle with a longitudinal slot at the sideadjacent to the boiler tubes. The steam passes through the tubesand'into the nozzle, from which it escapes in a thin sheet through thelongitudinal slot.

The inner tube is slidable Within the rigid tube and is at the same timerotatable, thereby permitting the nozzle to be placed in a plurality ofpositions and a1 lowing the same to be withdrawn into a recess in theboiler-wall to protect it from the heated gases.

Referring more particularly to the drawings, 1 represents the rear endof a fire-tube boiler having a back wall 2, of brick or similarmaterial, and a boiler-shell 3, through which pass fines 4, opening intoa rear combustion-chamber 5. the water is located in the boiler-shellsurrounding the fiues 4, and the gases of combustion pass .through theseflues from one end to the other, thereby heating the surrounding water.The wall 2 is provided with the usual opening 6, having an outer door 7.A chamber 8, having lateral extensions, is formed within the wall 2 nearthe inner side thereof and has an opening 9, communicating with thecombustion-chamber 5.

A rigid tube 10 passes through an opening within the wall 2 and has anenlarged end 11 on the outside of the wal1,presenting a shoulder 12,abutting against the wall. A pipe 13 discharges into the enlarged end 11of the tube 10 and is adapted to conduct steam from the boiler into saidtube. A drain-cock 14 is provided at the lower side of the chamber 11 topermit condensed steam or other water to be withdrawn therefrom. A head15, having a laterally-disposed threaded flange 16, is screwed upon thethreaded rim of the end 11 and has a stuifing-box 17 for a purpose whichwill be more clearly described hereinafter.

A second tube 18 is located within the tube 10 and extends from anopening in the inner end of the latter into the combustion-chainber. Thetube 18 has an integral head 19, fitting closely within the tube 10 andprovided with openings 20, through which steam may pass from the tube 10into the tube 18. A rod 21 has a threaded end screwed into asuitably-threaded opening in the head 19 and extends through the tube 10and through the stufling-box 17. The end passing through thestuffing-box 17 is provided with a handle 22, by means of which the tubemay be moved in a horizontal direction to slide the tube 18 within thetube 10 and by means of which the tube 18 may be rotated within the tube10. The rod 21 is It is understood that.

formed of jointed sections, each of which has a threaded stud adapted tobe screwed into a threaded opening in the end of the adjacent section.By this means the rod 21 may be lengthened or shortened as thecircumstances may require, for if the boiler-shell is close to the backwall 2 the rod 21 would project an inconvenient distance from thestufling-box 16 when the tube 18 is withdrawn as far as possible intothe tube 10 unless the rod were shortened.

The tube 18 has a constricted section 23 at the extremity adjacent tothe boiler-shell, the end of which is closed by an integral head 24. Anozzle 25 tapers toward its free end and has a longitudinal slot 26 onthe side adjacent to the firetubes of the boiler. The nozzle has a boreat its wider end transverse of the length of the nozzle by means ofwhich it may be secured to the tube 18, the bore fitting upon theconstricted section 23. A setscrew 27 provides means for rigidlysecuring the nozzle upon the constricted section 23. A lateral opening28 of the constricted section 23 communicates with the interior of thenozzle and permits the flow of the steam from the tube 18 into thenozzle.

When the device is not in operation, the tube 18 is withdrawn into thetube 10 by means of the rod 21, the nozzle being turned, so that it canpass through the opening 9 and into the chamber 8. The tube 18 is thenrotated by means of the rod 21 to dispose the nozzle to one side of theopening 9 within the chamber 8. Thus in an inoperative position thenozzle is afforded protection from the lgeated gases of combustionwithin the cham- When it is desired to clean the fire-tubes of theboiler, the nozzleis turned so as to pass through the opening 9 and thetube 18 is pro jected from the tube 10 as far as possible to bring thenozzle close to the fire-tubes. Steam is then turned into the pipe 18and flows thence through the tubes 10 and 18 and from the nozzle 25 in athin sheet and into the fire-tubes of the boiler, thereby blowing outthe soot or other accumulations within the same. By turning the handle22 the nozzle is rotated and all the fire-tubes of the boiler aresubjected to the action of the steam.

Having thus described my invention, I

claim as new and desire to secure by Letters Patent 1. In combination, aboiler having flues and a wall opposite the same having a recess on theinner side, a slidable tube passing through said wall and having alaterallydis posed nozzle adapted to lie within said recess in aninoperative position, and means for projecting said. nozzle through saidrecess.

2. In combination, a boiler having fiues and a wall opposite the samehaving a recess on the inner side, a rigid tube passing through saidwall, a second tube slidably mounted within said rigid tube and having alaterally-disposed nozzle adapted to lie Within said recess in aninoperative position, and means for passing steam through said tubes.

3. In combination, a boiler having flues and a wall opposite the samehaving a chamber provided with an opening on the inner side of saidwall, a rigid tube passing through I said wall, a second tube slidablyand rotatably mounted within said first tube and having alaterally-disposed nozzle adapted to be withdrawn into said chamber anddisposed to one side of said opening in an inoperative position, andmeans for passing steam through said tubes.

4. In combination, aboiler having fiues and a wall opposite the samehaving a chamber provided with an opening on the inner side of saidwall, a boiler-cleaner comprising a rigid tube passing through saidwall, a second tube slidably and rotatably mounted within said firsttube and having a rod-projecting from said first tube, said rod beingadapted to be manually operated to move said second tube within saidfirst tube, and a nozzle mounted at the end of said second tube and atan angle therewith, said nozzle tapering toward its free end and havinga longitudinal slot, said nozzle further'being adapted to be withdrawninto said chamber in an inoperative position.

5. A boiler-cleaner comprising a rigid tube passing through a wall of aboiler, a second tube slidably and rotatably mounted within said rigidtube and having a head Within said rigid tube, said head havingopenings, and a rod secured thereto and projecting from said rigid tube,said second tube having a con stricted end having a lateral opening andan integral head, a tapering nozzle having a longitudinal slot, and atransverse bore adapted to be mounted upon said constricted end, meansfor securing said nozzle to said second tube, and means for passingsteam into said rigid tube.

6. In a boiler-cleaner, a rigid tube passing through a wall of theboiler, a second tube slidable and rotatably mounted within said rigidtube, a nozzle mounted at the end of said second tube, and at an angletherewith, said second tube having a head provided with openings, andhaving a rod mounted thereon comprising removable sections, said rodprojecting through said rigid tube, and means for passing steam throughsaid tube.

In testimony whereof I have signed-my name to this specification in thepresence of two subscribing witnesses.

CHARLES H. PRESCOTT.

WVitnesses:

J. A. WOODLING, E. H. THOMAS.

